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Finding the Fourth Proportional to 616,892.90, 851,314.48 and 358,831.76

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Solution

The fourth proportional to 616,892.90, 851,314.48 and 358,831.76 is: 495,189.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    616,892.90 : 851,314.48 = 358,831.76 : x
  2. Step 2: Convert to fraction form
    616,892.90/851,314.48 = 358,831.76/x
  3. Step 3: Cross multiply
    616,892.90x = 851,314.48 × 358,831.76
  4. Step 4: Simplify right side
    616,892.90x = 305,478,673,171.89
  5. Step 5: Solve for x
    x = 305,478,673,171.89/616,892.90
  6. Step 6: Final answer
    x = 495,189.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.